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System: Use socket multiplier for sleeping when connected 

Should significantly reduce PINE latency.
This commit is contained in:
Stenzek 2024-07-06 21:46:23 +10:00
parent 1fd8d2701d
commit bc73dacea4
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1 changed files with 31 additions and 8 deletions
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39
src/core/system.cpp
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@ -2200,19 +2200,42 @@ void System::Throttle(Common::Timer::Value current_time)
return;
}
// Use a spinwait if we undersleep for all platforms except android.. don't want to burn battery.
// Linux also seems to do a much better job of waking up at the requested time.
#if !defined(__linux__) && !defined(__ANDROID__)
Common::Timer::SleepUntil(s_next_frame_time, g_settings.display_optimal_frame_pacing);
#ifdef ENABLE_SOCKET_MULTIPLEXER
// If we are using the socket multiplier, and have clients, then use it to sleep instead.
// That way in a query->response->query->response chain, we don't process only one message per frame.
if (s_socket_multiplexer && s_socket_multiplexer->HasAnyClientSockets())
{
Common::Timer::Value poll_start_time = current_time;
for (;;)
{
const u32 sleep_ms =
static_cast<u32>(Common::Timer::ConvertValueToMilliseconds(s_next_frame_time - poll_start_time));
s_socket_multiplexer->PollEventsWithTimeout(sleep_ms);
poll_start_time = Common::Timer::GetCurrentValue();
if (poll_start_time >= s_next_frame_time || (!g_settings.display_optimal_frame_pacing && sleep_ms == 0))
break;
}
}
else
{
// Use a spinwait if we undersleep for all platforms except android.. don't want to burn battery.
// Linux also seems to do a much better job of waking up at the requested time.
#if !defined(__linux__)
Common::Timer::SleepUntil(s_next_frame_time, g_settings.display_optimal_frame_pacing);
#else
Common::Timer::SleepUntil(s_next_frame_time, false);
#endif
}
#else
// No spinwait on Android, see above.
Common::Timer::SleepUntil(s_next_frame_time, false);
#endif
#if 0
Log_DevPrintf("Asked for %.2f ms, slept for %.2f ms, %.2f ms late",
Common::Timer::ConvertValueToMilliseconds(s_next_frame_time - current_time),
Common::Timer::ConvertValueToMilliseconds(Common::Timer::GetCurrentValue() - current_time),
Common::Timer::ConvertValueToMilliseconds(Common::Timer::GetCurrentValue() - s_next_frame_time));
DEV_LOG("Asked for {:.2f} ms, slept for {:.2f} ms, {:.2f} ms late",
Common::Timer::ConvertValueToMilliseconds(s_next_frame_time - current_time),
Common::Timer::ConvertValueToMilliseconds(Common::Timer::GetCurrentValue() - current_time),
Common::Timer::ConvertValueToMilliseconds(Common::Timer::GetCurrentValue() - s_next_frame_time));
#endif
s_next_frame_time += s_frame_period;